Hangzhou Huadong Medicine Group Zhejiang Huayi Pharmaceutical Co., Ltd. (hereinafter referred to ZHP) is a Chinese-Spanish joint venture, located in Yiwu city (350km south of Shanghai), Zhejiang province. It is a national Hi-tech Enterprise and Demonstrating Enterprise of Innovation. ZHP is a company of very close relationship with East-China Pharmaceutical Group, as well as a significant partner of Esteve Group in Asia.